{
  "manageEntity": {
    "action": "Save",
    "entityId": "2022964431",
    "entityType": "Track",
    "nonce": "0xc1e5d6573bad3c1dea3a503c144b2bff680202e11d9c744c11259c60627f1a9a",
    "signature": "0xf18cf1a931831cd0cbbe4b08fcc0d07073774158f9f0329af39cfad5e817e22b12eb0c88e83914351cb6f940d6476b04e13184e52e709c413939b07fa7aae1191c",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}